upgrade sentinel go to v0.6.2 to degrade system module in windows OS.

go.mod

@@ -5,7 +5,7 @@ require (
 	github.com/RoaringBitmap/roaring v0.4.23
 	github.com/Workiva/go-datastructures v1.0.50
 	github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5
-	github.com/alibaba/sentinel-golang v0.6.1
+	github.com/alibaba/sentinel-golang v0.6.2
 	github.com/apache/dubbo-getty v1.3.10
 	github.com/apache/dubbo-go-hessian2 v1.7.0
 	github.com/coreos/etcd v3.3.25+incompatible

go.sum

@@ -95,6 +95,8 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alibaba/sentinel-golang v0.6.1 h1:Pxyw2X7ryklvToF40KG9l4uuO90jRZA2MWb8Z3d1wPo=
 github.com/alibaba/sentinel-golang v0.6.1/go.mod h1:5jemKdyCQCKVf+quEia53fo9a17OSe+wnl9HX2NbNpc=
+github.com/alibaba/sentinel-golang v0.6.2 h1:1OjjpljJbNKWp9p5RJKxOqS1gHGZPUWPlCcokv5xYJs=
+github.com/alibaba/sentinel-golang v0.6.2/go.mod h1:5jemKdyCQCKVf+quEia53fo9a17OSe+wnl9HX2NbNpc=
 github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190808125512-07798873deee/go.mod h1:myCDvQSzCW+wB1WAlocEru4wMGJxy+vlxHdhegi1CDQ=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.18 h1:zOVTBdCKFd9JbCKz9/nt+FovbjPFmb7mUnp8nH9fQBA=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.18/go.mod h1:v8ESoHo4SyHmuB4b1tJqDHxfTGEciD+yhvOU/5s1Rfk=